"It is Texas A&M's long-standing practice not to respond to such questions concerning specific student-athletes," the school said in an email statement to the AP.

It's unclear what level of involvement the NCAA has at this point. When a player is believed to have broken rules, it's not uncommon for a school to declare that player ineligible, then ask the NCAA to investigate and reinstate the athlete's eligibility.

Nate Fitch, a friend of Manziel's, posted several tweets at that time saying he was with the Heisman winner in South Florida for the BCS title game. None of Fitch's tweets around the dates of that trip suggested anything about meeting with Tieman, or any memorabilia signings.

Tieman's Facebook page was taken down Sunday night, but cached images collected from the page included a photo of him and Notre Dame's Manti Te'o, which was purportedly taken Jan. 3, less than a week before the BCS game.